Noise reducing means



NOISE REDUCING HEARS Filed April 24, 1936 Patented Aug. 3, 1937 UNITED STATES PATENT OFFICE 1 Claim.

This invention appertains to new and useful improvements in radio receiving systems and more particularly to novel means for eliminating noise in reception.

An important object of the present invention is to provide an improvement in radio receiving systems by grounding the several distinct circuits of a receiver or other electrical apparatus through the use of individual conductors leading from said circuits to a remotely situated common ground wire or ground.

Another important object of the present invention is to provide a radio receiver wherein each of the several circuits is provided with an individual ground wire leading outside of the set proper to connect to ground.

Other important objects and advantages of the invention will become apparent to the reader 01' the following specification.

In the drawing:

Figure 1 represents a front elevational view of a radio cabinet, showing the cable leading therefrom, with the power line and ground conductors contained therein.

Figure 2 represents a fragmentary detailed sectional view, showing a cable.

Figure 3 represents a cross sectional view through the cable, taken substantially on line 3-3 of Figure 2.

Referring to the drawing wherein like numerals designate like parts. It is known that a conventional radio receiving system includes the usual detector and amplifying stages. In the where all of the ground branch wires 5 are connected to a plate or other connector I from which a, wire 8 extends to ground. These wires and the current supply conductors 9 are all wrapped in a case l0 and obviously, the branch ground conductors 5 serve to encase the conductors 9 so as to carry off any induction from the supply wires 9.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:-

In combination with a multi-circuit radio receiver including a cabinet, ground wires extending from the circuits requiring ground connections, said ground wires extending exteriorly from the cabinet, a case extending from the cabinet and in which the ground wires extend, a member closing the outer end of the case and being of electricity conductive material and to which the outer ends of the ground wires are connected, and a ground wire extending from the said closure member.

ROBERT WILLIAM FARRAR. 

